Help! Does anyone know anything about flat screen TVs?

[mill4023]

Right, but this was a Samsung LED television, and apparently pixelation is its weakness.

What is LED TV?

The first thing to know about LED (Light Emitting Diode) TVs is that they are simply LCD TVs with a different kind of backlighting. The screen remains the same but LEDs are used in place of Cold Cathode Fluorescent Lamps (CCFL) that are found in most LCD TVs.

I can't imagine how pixelation could be caused by a different light source. In fact, I think that's impossible. Like Bicker said, pixelation occurs in the signal, it's not caused by the display.

 

[bicker]

It isn't the different light source ... halos are caused by software that is trying to post-process the video to apply some type of effect. In the cases I mentioned (and generally the features that cause halos), the software is attempting to address a natural condition, called motion judder. Motion judder itself is caused by the fact that movies are filmed at 24 frames per second, while television display 30 frames per second (or 60, 120, 240 fps, for more advanced video displays).

What puzzles me about motion judder 24 and 30 share the same factors at 120 so shouldn't motion judder no longer be a problem for 120 fps displays?

 

[Squirlz]

I can't imagine how pixelation could be caused by a different light source. In fact, I think that's impossible. Like Bicker said, pixelation occurs in the signal, it's not caused by the display.

I don't know what the cause is, but I was looking at a dozen sets, a mixture of LCD, LED and plasma, all fed by the same signal on the same channel. Only the LED sets pixelated where there was quick motion. The same occurred when fed by a BluRay player through an HDMI cable.

 

[Micca]

It isn't the different light source ... halos are caused by software that is trying to post-process the video to apply some type of effect. In the cases I mentioned (and generally the features that cause halos), the software is attempting to address a natural condition, called motion judder. Motion judder itself is caused by the fact that movies are filmed at 24 frames per second, while television display 30 frames per second (or 60, 120, 240 fps, for more advanced video displays).

What puzzles me about motion judder 24 and 30 share the same factors at 120 so shouldn't motion judder no longer be a problem for 120 fps displays?

Is this the same thing as what is called "motion blur"?

 

[bicker]

AFAIK, "motion blur" is a more natural phenomenon, having to do with the ability of the medium itself (the diodes, if you will, or at least the electronics driving them) being able to react as quickly to changing data as the data itself is changing; while "motion judder" is specifically a manifestation of the fps translation - it is the difference between a physical thing and a mathematical thing.

In other words, if you could press a button that would keep each logical frame of data on-screen for a number of cycles (effectively going "slo-mo") then motion blur should go away, while motion judder would not.